Accelerator Pedal Position Lost on J1939
The DD-898-9 (Detroit Diesel DD Series) diesel fault code means: Accelerator Pedal Position Lost on J1939. This is a serious severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $1,200-$3,800
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Common Symptoms
- Check Engine Light / Amber Warning Lamp illuminated
- No throttle response / limp
Probable Causes (Ranked by Likelihood)
- Failed accelerator pedal module Likely
- CAN break to pedal Likely
Step-by-Step Diagnostic Procedure
Read APP1/APP2 live values via DDDL.
Inspect pedal connector for bent pins.
Replace electronic pedal assembly if it reports no data.
Frequently Asked Questions
What is Detroit Diesel fault code DD-898-9?
Detroit Diesel fault DD-898-9 (SPN 898 FMI 9) indicates: Accelerator Pedal Position Lost on J1939. It is a serious-severity fault and is commonly seen on DD13/DD15/DD16 engines in Freightliner and Western Star chassis.
Can I drive my Freightliner or Western Star with fault DD-898-9?
It depends on severity. Critical and serious faults trigger derate or engine shutdown — do not continue driving. Moderate faults usually allow continued operation short-term but schedule repair to prevent cascading aftertreatment damage.
How much does it cost to fix Detroit Diesel fault DD-898-9?
Typical repair cost is $1,200-$3,800. Sensor/harness fixes fall at the low end; turbo actuator, injector, aftertreatment component, or head gasket repairs fall at the high end. Detroit DDDL software and sometimes factory parameter reset are required for proper reset.
Sources
This page is built from documented references. Verify against your own service info before repair work.